D offers you the niceness of not having to be tied to backward compatibility for See/Sepples. There are a ton of things in Sepples that are just there for backward compatibility with old-as-fuck shit that nobody uses anymore; and if programs are actively being developed with these things, the companies should die in the first place.
Sepplesox was actually going to be somewhat nice, but then they made string support even worse than it is currently. Nice job on doing new sets of literals instead of abstracting string handling away from the programmers, jackasses. Time handling could use an upgrade too. Doing anything with networking, time, or strings (you know, the things you need to connect to the world) in Sepples is a horrible idea. Threading support, also a newer concept being born past 1980, is being added in Sepplesox, so I can't really complain.
But damn, D is in a good position to become a great language. You might think that See/Sepples are unfixable, but you would be incorrect.